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Preparation of homochiral crown ether containing (S)-1-(1-adamantyl)ethane-1,2-diol as a chiral subunit and its enantioselective complexation with an organic ammonium cation

โœ Scribed by Koichiro Naemura; Takashi Mizo-oku; Kimiko Kamada; Keiji Hirose; Yoshito Tobe; Masami Sawada; Yoshio Takai

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
654 KB
Volume
5
Category
Article
ISSN
0957-4166

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โœฆ Synopsis

Homochiral l-(l-adamantyl)ethane-l,Zdiol(5) was prepared and 1t.s absolute configuration was determined to be (q-(+)-5 by enzymatic and 'H n.m.r. spectroscopic methods. Using (s)-(+)-5 as a chual subunit, the homochiral crown ether (+)-18 was K. NAEMURA et al. (23% yield), [a], +37.1 (acetone), mp 193-195 "C, as a sparingly soluble solid, which was confirmed to

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